Apparatus for electrically lighting railway-trains.



No. 7II,42I. Patented Oct. I4, |902. A. B. GILL.

APPARATUS FOR ELECTRICALLY LIGHTING RAILWAY TRAINS.

(Appl'icmon med Aug. 25. 1902.)

(lo Model.)

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ARTHUR BERNARD GILL, OF LONDON, ENGLAND, ASSIGNOR TO J. STONE AND COMPANY, OF DEPTFORD, ENGLAND, A FIRM.

APPARATUS FOR ELECTRICALLY LIGHTING RAILWAY-TRAINS.

SPECIFICATION forming part of Letters Patent No. 711,421, dated October 14, 1902.

Application filed August 25,1902. Serial No. 120,918. (No model.)

To al@ 11171/0111/ t may concern: y M is carried entirely on an extension N of Beit known that I, ARTHUR BERNARD GIIJL, the bearing N for the dynamo-spindle T; but a subject of the King of Great Britain, residit obtains the necessary friction for causing ing at Carlton, Black-heath Park, London, it to make a partial rotation in the direction 5 England, have invented new and useful Iniof the rotation of the armature indirectlyprovenients in Apparatus for Electrically that is to say, from one or more (in this ex- LightingRailway-Trains,of which thefollowample two) springplungers P, which are ing is a specification.` tipped with blocks O of carbon or other an- Thisinvention has reference to an improved tifriction al material-as,.for instance, white- 6o Io apparatus or system for electrically lighting pinetal. These spring-plungers are carried railway-trains and where the dynamo is driven in cylinders Q or other guides, which in turn by a belt from a wheel-axle or follows the are fixed to (in this case adjustably so) or speed of the train and the amount of current form part of two extensions R of the rotatproduced is regulated by compound winding ing cone R. The carbon blocks O press I5 of the dynamo, or by altering the lead of against diametricallyopposite sides ofachanthe brushes, or by altering the intensity of nel-way in the boss of the rocking arm M, and the magnetic field, or by inserting resistances consequently by their friction cause the rockin the main circuit or in the field-circuit, or ing arm to rotate in the same direction as the in both. In order that the current may alarmature may happen to rotate as far as the 7o zo ways flow in the same direction, fixed constops S2 on the switchboard allow. This frictacts on a switchboard are used, and on the tion is, however, only applied while the dydynamo-spindle is mounted a contact-arm namo is running at a low speed, because as which is controlled bya centrifugal governor soon as the speed increases to the predeterand is carried around by indirect friction mined amount the centrifugal force causes 25 with the dynamo-spindleuntil it is arrested the plnngers P to fly outward, and thus do by a stop on the switchboard, and when the away with all friction. The springs P/ at the speed increases the contact-arm is by the govback of the plnngers P, however, are so adernor slid up the spindle and the arm-conj usted that this shall not take place until the tacts slid into the fixed contacts. When the dynamo has attained such a speed that the 8o 3o carriage runs in the opposite direction, the rocking arm M has been carried around to its contact-arm is by indirect friction with the proper position against a stop S2 and has been spindle carried against another stop on the pushed along the bearing N N and its springswitchboard and makes contact when the contacts M5 have entered the contacts S on speed increases. From the switchboard the the switchboard S by the sidewise pressure of g5 current is led to the circuits for lamps and the carbon blocks O against the flanges M or accumulator. When the carriage stops, the M2 on the boss of the rocking arm M. The current to the lamps is taken from an accuconverse action takes place when the dynamo mulator. slows down, the centrifugal force thereby de- Myinvention is illustrated in the accompacreasing, and the plungers P return into the 9o 4o nying drawings, in whichchannel-way, so that the rocking-arm con- Figure l shows the invention in sectional tacts M3 are withdrawn from the fixed conelevation. Fig. 2 is a similarviewofa moditacts S by the sidewise pressure on the carication. Fig. 3 is a like view'of a further bon blocks against the flanges M' or M2. The modied embodiment of the invention, and advantages of this arrangement are, first,

45 Fig. 4 is an elevation of the fixed contactthat lubrication of this part is no longer necboard. essai-y, and therefore the main bearing alone Three dynamo-reversing arrangements are is lubricated by a ring-oiler or other mechanshown in Figs. l, 2, and 3, and the end view, ical oiler; second, that in case the bearing Fig. 4, shows the fixed contact-board generwears out of true, so that the spindle T gets Ico 5o ally used therewith. out of line, this will not appreciably affect the Referring first to Fig. l, the'rocking arm working of the rocking arm M toward or away part of the rocking arm,and against the plane,

conical, or curved inner surface of this rim friction-blocks are pressed which are carried on extensions of the ordinary governor-arms. Such an arrangement is shown in Fig. 2,where the carbon blocks O are pressed against the plane inner surface of the rim MX, the blocks being mounted on extensions V of the governor-arms V. This arrangement provides only for the partial rotation of the-rocking arm M and not for inserting its contacts, the

former of which would have to be performed by means of end pressure from the cone R against the boss of the rocking arm M and the latter by the pressure of the spring W against a washer or collar U, fixed on the spindle T, which spring-pressure would come .into action as the centrifugal effort of the governor allowed the cone R to return into its normal position.

Fig. 3 shows a rim M with a conical face for the carbon blocks O to press against.

Fig. 4 shows the switchboard S with contacts S and stops S2. The wires 1 and 2 connect 'with the `magnet-coils, the wires 3 and 4 with the accumulator, and the wire 5 with the lamps. 7 and 8 represent the carbon brushes What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of a rotary shaft,switch contacts and electrical connections, a reversible switch lever, a stationary bearing on which said switch-lever is loosely mounted and adapted to move longitudinally and circumferentially relative to said shaft, a centrifugal governor connected to said shaft and adapted to move said switch-lever toward said contacts, and means operated by said governor and adapted Ato frictionally engage with a part connected to said switch-lever to turn the latter, said means-being moved out Instead of this'v switch-lever to turn the latter, said shoes being moved out of contact with said part by centrifugal force when a certain speed of said shaft is attained, substantially as set forth.

3. The combination of a rotary dynamoshaft, a stationary bearing therefor, switchcontacts and electrical connections, a reversible switch-lever loosely mounted on said stationary bearing and adapted to move longitudinally and circumferentially relative to said shaft, a cone movable longitudinally-on said shaft, a centrifugal governor carried by said shaft and adapted to operate said cone to move said switch-lever' toward said contacts, friction-shoes carried by said cone and adapted to frictionally engage a part connected to said switch-lever to turn the latter, said shoes being moved out of contact with said part by centrifugal force when acer-tain speed of said dynamo-shaft is attained, and

a spring coiled about said shaft between said bearing and said cone for moving said switchlever away from said contacts, substantially as set forth.

4. The combination with a dynamo and its switchboard provided with contacts and electric circuits leading therefrom, a reversible contact-lever adapted to connect either pair ofV contacts, said lever capable of sliding along and of turning on the dynamo-spindle, of an extension of the dynamo-spindle bearing upon which the contact-lever is loosely mounted, acone capable of sliding along a feather on the dynamospindle,a helical springv within the extension and acting against th'e cone, a centrifugal governor on the dynamospindle, Hanges on the boss of the contactlever and blocks working between the flanges and held in guides provided with springs on the cone, for transmitting by indirect friction rotation from the cone to the contactlever, the said blocks being by centrifugal force thrown out of contact with the flanges Vwhen a certain speed has been attained,

against the eort of their springs, substantially as set forth.

In testimony that Il claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

ARTHUR BERNARD GILL.

Witnesses:

.VICTOR JENSEN,

JOSEPH LAKE.

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